[GPSNavX]

Saildocs (which uses the same GFS model) has wind, precipitation, temperature, pressure. Contour is not a data, but instead how the data is presented. It is true SailDocs is on 12 hour increments instead of 3 hour. The big advantage I see with SailDocs is the email delivery function. One can even setup it up to automatically send a new GRIB file on a selectable frequency.

http://saildocs.com/